The apparent digestibility of fibre in trotters when dietary soybean oil is substituted for an iso‐energetic amount of glucose

W. L. Jansen, J. van der Kuilen, S. N. Geelen, A. Beynen
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引用次数: 9

Abstract

An attempt was made to quantify the effect of extra fat intake on fibre utilization in horses. In a 4×4 cross‐over trial with feeding periods of 24 days each, eight mature trotting horses (age 4 to 12 years, 407 to 531 kg BW) were given four diets. The concentrates were formulated to contain either soybean oil or an iso‐energetic amount of glucose or combinations of the two ingredients. The concentrates were fed in combination with the same amount of hay so that the whole diets contained 30, 50, 77 or 108 g EE/kg DM. Apart from the amounts of fat and glucose the four diets were identical. With an increase of 10g/kg DM of soybean oil the apparent total tract digestibility of crude fibre was reduced with 0.9 percentage units. Extra fat intake also reduced apparent protein and NFE digestibility, but raised apparent fat digestibility. Although the present results may hold specifically for the conditions of this study, it is suggested that the observed interaction between fat content of the diet and macronutrient utilization might have consequences for practical horse feeding in that calculating the energy content of high‐fat diets on the basis of feedstuff tables will lead to over‐ or underestimating the amount of energy provided by the various ingredients of the diets.
当饲粮用大豆油代替等量葡萄糖时,马驹纤维的表观消化率
试图量化额外脂肪摄入对马纤维利用的影响。在4×4交叉试验中,8匹成熟小跑马(4 - 12岁,体重407 - 531公斤)分别饲喂4种饲料,每匹饲料饲喂期为24天。浓缩液被配制成含有大豆油或等量葡萄糖或两种成分的组合。精料与相同量的干草混合饲喂,使整个饲粮的粗脂肪含量为30、50、77和108 g /kg DM,除脂肪和葡萄糖含量外,4种饲粮的粗脂肪和葡萄糖含量相同。大豆油添加量每增加10g/kg DM,粗纤维表观全消化道消化率降低0.9个百分点。额外的脂肪摄入也降低了蛋白质和非铁的表观消化率,但提高了脂肪的表观消化率。尽管目前的结果可能只适用于本研究的条件,但研究表明,观察到的日粮脂肪含量与大量营养素利用之间的相互作用可能会对实际的马饲养产生影响,因为在饲料表的基础上计算高脂肪日粮的能量含量会导致高估或低估日粮中各种成分提供的能量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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